Product Registration Code error

I just purchased a physical copy of Storm Legion, which has the base game with it. I made an account, and I was playing a character, when I got that Moneybags thing in the mail, and when I tried to equip it, I realized that I was still on a trial account/RIFT Lite (I got a message saying I can't equip rare or higher qualities on a trial account). So I moseyed on over to my account page, and went to apply code under the RIFT Lite details. I typed in my code, but then I get an error saying "We are unable to complete your purchase."

Tried about 3 times and it still didn't work. Does this mean that the code has been used? The store didn't lable it as Pre-Owned or something. Even then, I'd doubt they'd allow someone to trade in a game with a used code in the manual. Grrrrr.

---------- Post added 2012-12-11 at 12:54 PM ----------

What's also fun is going over to the Rift forum's over at Trion, registering for the forums, and seeing this:
- You cannot post new threads.
- You cannot post in threads.

... LOGIC!

By Blizzard Entertainment:
Part of the reason is that Battlegrounds are like ducks.

Silly question, you made an account, but did you pay for a sub? The game does not come with a free month like other games, so if you have not signed up for a monthly subscription, you are still a on RIFT Lite, or trial status.